A 7-ft boom is held by a ball and socket at A and by two cables EBFand DC; cable EBFpasses around a frictionless pulley at B. Consider the force P= 390 lb. 3 ft - 3 ft→–4 ft– 4 ft

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Section: Chapter Questions
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**Required information**

NOTE: *This is a multi-part question. Once an answer is submitted, you will be unable to return to this part.*

A 7-ft boom is held by a ball and socket at \( A \) and by two cables \( EBF \) and \( DC \); cable \( EBF \) passes around a frictionless pulley at \( B \). Consider the force \( P = 390 \, \text{lb} \).

[Diagram Description]

The diagram shows a 3D representation of a structure with the following components:

- A boom \( AB \) inclined within an \( xyz \)-coordinate system. The boom is 7 feet long.
- The boom starts at a ball and socket joint at point \( A \) and extends towards \( B \).
- Cable \( EBF \) runs from point \( E \) at the \( y \)-axis, goes around a frictionless pulley at \( B \), and ends at point \( F \) along the \( z \)-axis.
- Cable \( DC \) runs horizontally from point \( D \) on the \( z \)-axis to point \( C \) on the \( x \)-axis, positioned 4 feet from \( B \).
- Distances are marked along the axes: 4 feet along \( x \), 6 feet up \( y \), and 4 feet along \( z \).
- A downward force \( P = 390 \, \text{lb} \) is applied at point \( C \).

**Determine the tension in each cable.**

The tension in cable \( EBF \) is \_\_\_\_ lb.

The tension in cable \( DC \) is \_\_\_\_ lb.
Transcribed Image Text:**Required information** NOTE: *This is a multi-part question. Once an answer is submitted, you will be unable to return to this part.* A 7-ft boom is held by a ball and socket at \( A \) and by two cables \( EBF \) and \( DC \); cable \( EBF \) passes around a frictionless pulley at \( B \). Consider the force \( P = 390 \, \text{lb} \). [Diagram Description] The diagram shows a 3D representation of a structure with the following components: - A boom \( AB \) inclined within an \( xyz \)-coordinate system. The boom is 7 feet long. - The boom starts at a ball and socket joint at point \( A \) and extends towards \( B \). - Cable \( EBF \) runs from point \( E \) at the \( y \)-axis, goes around a frictionless pulley at \( B \), and ends at point \( F \) along the \( z \)-axis. - Cable \( DC \) runs horizontally from point \( D \) on the \( z \)-axis to point \( C \) on the \( x \)-axis, positioned 4 feet from \( B \). - Distances are marked along the axes: 4 feet along \( x \), 6 feet up \( y \), and 4 feet along \( z \). - A downward force \( P = 390 \, \text{lb} \) is applied at point \( C \). **Determine the tension in each cable.** The tension in cable \( EBF \) is \_\_\_\_ lb. The tension in cable \( DC \) is \_\_\_\_ lb.
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